package com.shop.filter;


import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import java.io.IOException;

/**
 * 访问请求会先进入过滤器放行之后才会进入servlet
 */
@WebFilter("/*")
public class EncodeingFilter implements Filter {

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        //处理请求对象字符集编码
        servletRequest.setCharacterEncoding("utf-8");
        //处理响应对象字符集编码
        servletResponse.setCharacterEncoding("utf-8");
        servletResponse.setContentType("text/html;charset=utf-8");
        //放行请求 到下一个过滤器
        filterChain.doFilter(servletRequest,servletResponse);
    }

    @Override
    public void destroy() {

    }
}
